[thirdparty/git.git] / archive-zip.c

/*
 * Copyright (c) 2006 Rene Scharfe
 */
#include "cache.h"
#include "archive.h"
#include "streaming.h"
#include "utf8.h"

static int zip_date;
static int zip_time;

static unsigned char *zip_dir;
static unsigned int zip_dir_size;

static unsigned int zip_offset;
static unsigned int zip_dir_offset;
static unsigned int zip_dir_entries;

#define ZIP_DIRECTORY_MIN_SIZE	(1024 * 1024)
#define ZIP_STREAM	(1 <<  3)
#define ZIP_UTF8	(1 << 11)

struct zip_local_header {
	unsigned char magic[4];
	unsigned char version[2];
	unsigned char flags[2];
	unsigned char compression_method[2];
	unsigned char mtime[2];
	unsigned char mdate[2];
	unsigned char crc32[4];
	unsigned char compressed_size[4];
	unsigned char size[4];
	unsigned char filename_length[2];
	unsigned char extra_length[2];
	unsigned char _end[1];
};

struct zip_data_desc {
	unsigned char magic[4];
	unsigned char crc32[4];
	unsigned char compressed_size[4];
	unsigned char size[4];
	unsigned char _end[1];
};

struct zip_dir_header {
	unsigned char magic[4];
	unsigned char creator_version[2];
	unsigned char version[2];
	unsigned char flags[2];
	unsigned char compression_method[2];
	unsigned char mtime[2];
	unsigned char mdate[2];
	unsigned char crc32[4];
	unsigned char compressed_size[4];
	unsigned char size[4];
	unsigned char filename_length[2];
	unsigned char extra_length[2];
	unsigned char comment_length[2];
	unsigned char disk[2];
	unsigned char attr1[2];
	unsigned char attr2[4];
	unsigned char offset[4];
	unsigned char _end[1];
};

struct zip_dir_trailer {
	unsigned char magic[4];
	unsigned char disk[2];
	unsigned char directory_start_disk[2];
	unsigned char entries_on_this_disk[2];
	unsigned char entries[2];
	unsigned char size[4];
	unsigned char offset[4];
	unsigned char comment_length[2];
	unsigned char _end[1];
};

/*
 * On ARM, padding is added at the end of the struct, so a simple
 * sizeof(struct ...) reports two bytes more than the payload size
 * we're interested in.
 */
#define ZIP_LOCAL_HEADER_SIZE	offsetof(struct zip_local_header, _end)
#define ZIP_DATA_DESC_SIZE	offsetof(struct zip_data_desc, _end)
#define ZIP_DIR_HEADER_SIZE	offsetof(struct zip_dir_header, _end)
#define ZIP_DIR_TRAILER_SIZE	offsetof(struct zip_dir_trailer, _end)

static void copy_le16(unsigned char *dest, unsigned int n)
{
	dest[0] = 0xff & n;
	dest[1] = 0xff & (n >> 010);
}

static void copy_le32(unsigned char *dest, unsigned int n)
{
	dest[0] = 0xff & n;
	dest[1] = 0xff & (n >> 010);
	dest[2] = 0xff & (n >> 020);
	dest[3] = 0xff & (n >> 030);
}

static void *zlib_deflate(void *data, unsigned long size,
		int compression_level, unsigned long *compressed_size)
{
	git_zstream stream;
	unsigned long maxsize;
	void *buffer;
	int result;

	memset(&stream, 0, sizeof(stream));
	git_deflate_init(&stream, compression_level);
	maxsize = git_deflate_bound(&stream, size);
	buffer = xmalloc(maxsize);

	stream.next_in = data;
	stream.avail_in = size;
	stream.next_out = buffer;
	stream.avail_out = maxsize;

	do {
		result = git_deflate(&stream, Z_FINISH);
	} while (result == Z_OK);

	if (result != Z_STREAM_END) {
		free(buffer);
		return NULL;
	}

	git_deflate_end(&stream);
	*compressed_size = stream.total_out;

	return buffer;
}

static void write_zip_data_desc(unsigned long size,
				unsigned long compressed_size,
				unsigned long crc)
{
	struct zip_data_desc trailer;

	copy_le32(trailer.magic, 0x08074b50);
	copy_le32(trailer.crc32, crc);
	copy_le32(trailer.compressed_size, compressed_size);
	copy_le32(trailer.size, size);
	write_or_die(1, &trailer, ZIP_DATA_DESC_SIZE);
}

static void set_zip_dir_data_desc(struct zip_dir_header *header,
				  unsigned long size,
				  unsigned long compressed_size,
				  unsigned long crc)
{
	copy_le32(header->crc32, crc);
	copy_le32(header->compressed_size, compressed_size);
	copy_le32(header->size, size);
}

static void set_zip_header_data_desc(struct zip_local_header *header,
				     unsigned long size,
				     unsigned long compressed_size,
				     unsigned long crc)
{
	copy_le32(header->crc32, crc);
	copy_le32(header->compressed_size, compressed_size);
	copy_le32(header->size, size);
}

static int has_only_ascii(const char *s)
{
	for (;;) {
		int c = *s++;
		if (c == '\0')
			return 1;
		if (!isascii(c))
			return 0;
	}
}

#define STREAM_BUFFER_SIZE (1024 * 16)

static int write_zip_entry(struct archiver_args *args,
			   const unsigned char *sha1,
			   const char *path, size_t pathlen,
			   unsigned int mode)
{
	struct zip_local_header header;
	struct zip_dir_header dirent;
	unsigned long attr2;
	unsigned long compressed_size;
	unsigned long crc;
	unsigned long direntsize;
	int method;
	unsigned char *out;
	void *deflated = NULL;
	void *buffer;
	struct git_istream *stream = NULL;
	unsigned long flags = 0;
	unsigned long size;

	crc = crc32(0, NULL, 0);

	if (!has_only_ascii(path)) {
		if (is_utf8(path))
			flags |= ZIP_UTF8;
		else
			warning("Path is not valid UTF-8: %s", path);
	}

	if (pathlen > 0xffff) {
		return error("path too long (%d chars, SHA1: %s): %s",
				(int)pathlen, sha1_to_hex(sha1), path);
	}

	if (S_ISDIR(mode) || S_ISGITLINK(mode)) {
		method = 0;
		attr2 = 16;
		out = NULL;
		size = 0;
		compressed_size = 0;
		buffer = NULL;
		size = 0;
	} else if (S_ISREG(mode) || S_ISLNK(mode)) {
		enum object_type type = sha1_object_info(sha1, &size);

		method = 0;
		attr2 = S_ISLNK(mode) ? ((mode | 0777) << 16) :
			(mode & 0111) ? ((mode) << 16) : 0;
		if (S_ISREG(mode) && args->compression_level != 0 && size > 0)
			method = 8;
		compressed_size = size;

		if (S_ISREG(mode) && type == OBJ_BLOB && !args->convert &&
		    size > big_file_threshold) {
			stream = open_istream(sha1, &type, &size, NULL);
			if (!stream)
				return error("cannot stream blob %s",
					     sha1_to_hex(sha1));
			flags |= ZIP_STREAM;
			out = buffer = NULL;
		} else {
			buffer = sha1_file_to_archive(args, path, sha1, mode,
						      &type, &size);
			if (!buffer)
				return error("cannot read %s",
					     sha1_to_hex(sha1));
			crc = crc32(crc, buffer, size);
			out = buffer;
		}
	} else {
		return error("unsupported file mode: 0%o (SHA1: %s)", mode,
				sha1_to_hex(sha1));
	}

	if (buffer && method == 8) {
		deflated = zlib_deflate(buffer, size, args->compression_level,
				&compressed_size);
		if (deflated && compressed_size - 6 < size) {
			/* ZLIB --> raw compressed data (see RFC 1950) */
			/* CMF and FLG ... */
			out = (unsigned char *)deflated + 2;
			compressed_size -= 6;	/* ... and ADLER32 */
		} else {
			method = 0;
			compressed_size = size;
		}
	}

	/* make sure we have enough free space in the dictionary */
	direntsize = ZIP_DIR_HEADER_SIZE + pathlen;
	while (zip_dir_size < zip_dir_offset + direntsize) {
		zip_dir_size += ZIP_DIRECTORY_MIN_SIZE;
		zip_dir = xrealloc(zip_dir, zip_dir_size);
	}

	copy_le32(dirent.magic, 0x02014b50);
	copy_le16(dirent.creator_version,
		S_ISLNK(mode) || (S_ISREG(mode) && (mode & 0111)) ? 0x0317 : 0);
	copy_le16(dirent.version, 10);
	copy_le16(dirent.flags, flags);
	copy_le16(dirent.compression_method, method);
	copy_le16(dirent.mtime, zip_time);
	copy_le16(dirent.mdate, zip_date);
	set_zip_dir_data_desc(&dirent, size, compressed_size, crc);
	copy_le16(dirent.filename_length, pathlen);
	copy_le16(dirent.extra_length, 0);
	copy_le16(dirent.comment_length, 0);
	copy_le16(dirent.disk, 0);
	copy_le16(dirent.attr1, 0);
	copy_le32(dirent.attr2, attr2);
	copy_le32(dirent.offset, zip_offset);

	copy_le32(header.magic, 0x04034b50);
	copy_le16(header.version, 10);
	copy_le16(header.flags, flags);
	copy_le16(header.compression_method, method);
	copy_le16(header.mtime, zip_time);
	copy_le16(header.mdate, zip_date);
	if (flags & ZIP_STREAM)
		set_zip_header_data_desc(&header, 0, 0, 0);
	else
		set_zip_header_data_desc(&header, size, compressed_size, crc);
	copy_le16(header.filename_length, pathlen);
	copy_le16(header.extra_length, 0);
	write_or_die(1, &header, ZIP_LOCAL_HEADER_SIZE);
	zip_offset += ZIP_LOCAL_HEADER_SIZE;
	write_or_die(1, path, pathlen);
	zip_offset += pathlen;
	if (stream && method == 0) {
		unsigned char buf[STREAM_BUFFER_SIZE];
		ssize_t readlen;

		for (;;) {
			readlen = read_istream(stream, buf, sizeof(buf));
			if (readlen <= 0)
				break;
			crc = crc32(crc, buf, readlen);
			write_or_die(1, buf, readlen);
		}
		close_istream(stream);
		if (readlen)
			return readlen;

		compressed_size = size;
		zip_offset += compressed_size;

		write_zip_data_desc(size, compressed_size, crc);
		zip_offset += ZIP_DATA_DESC_SIZE;

		set_zip_dir_data_desc(&dirent, size, compressed_size, crc);
	} else if (stream && method == 8) {
		unsigned char buf[STREAM_BUFFER_SIZE];
		ssize_t readlen;
		git_zstream zstream;
		int result;
		size_t out_len;
		unsigned char compressed[STREAM_BUFFER_SIZE * 2];

		memset(&zstream, 0, sizeof(zstream));
		git_deflate_init(&zstream, args->compression_level);

		compressed_size = 0;
		zstream.next_out = compressed;
		zstream.avail_out = sizeof(compressed);

		for (;;) {
			readlen = read_istream(stream, buf, sizeof(buf));
			if (readlen <= 0)
				break;
			crc = crc32(crc, buf, readlen);

			zstream.next_in = buf;
			zstream.avail_in = readlen;
			result = git_deflate(&zstream, 0);
			if (result != Z_OK)
				die("deflate error (%d)", result);
			out = compressed;
			if (!compressed_size)
				out += 2;
			out_len = zstream.next_out - out;

			if (out_len > 0) {
				write_or_die(1, out, out_len);
				compressed_size += out_len;
				zstream.next_out = compressed;
				zstream.avail_out = sizeof(compressed);
			}

		}
		close_istream(stream);
		if (readlen)
			return readlen;

		zstream.next_in = buf;
		zstream.avail_in = 0;
		result = git_deflate(&zstream, Z_FINISH);
		if (result != Z_STREAM_END)
			die("deflate error (%d)", result);

		git_deflate_end(&zstream);
		out = compressed;
		if (!compressed_size)
			out += 2;
		out_len = zstream.next_out - out - 4;
		write_or_die(1, out, out_len);
		compressed_size += out_len;
		zip_offset += compressed_size;

		write_zip_data_desc(size, compressed_size, crc);
		zip_offset += ZIP_DATA_DESC_SIZE;

		set_zip_dir_data_desc(&dirent, size, compressed_size, crc);
	} else if (compressed_size > 0) {
		write_or_die(1, out, compressed_size);
		zip_offset += compressed_size;
	}

	free(deflated);
	free(buffer);

	memcpy(zip_dir + zip_dir_offset, &dirent, ZIP_DIR_HEADER_SIZE);
	zip_dir_offset += ZIP_DIR_HEADER_SIZE;
	memcpy(zip_dir + zip_dir_offset, path, pathlen);
	zip_dir_offset += pathlen;
	zip_dir_entries++;

	return 0;
}

static void write_zip_trailer(const unsigned char *sha1)
{
	struct zip_dir_trailer trailer;

	copy_le32(trailer.magic, 0x06054b50);
	copy_le16(trailer.disk, 0);
	copy_le16(trailer.directory_start_disk, 0);
	copy_le16(trailer.entries_on_this_disk, zip_dir_entries);
	copy_le16(trailer.entries, zip_dir_entries);
	copy_le32(trailer.size, zip_dir_offset);
	copy_le32(trailer.offset, zip_offset);
	copy_le16(trailer.comment_length, sha1 ? 40 : 0);

	write_or_die(1, zip_dir, zip_dir_offset);
	write_or_die(1, &trailer, ZIP_DIR_TRAILER_SIZE);
	if (sha1)
		write_or_die(1, sha1_to_hex(sha1), 40);
}

static void dos_time(time_t *time, int *dos_date, int *dos_time)
{
	struct tm *t = localtime(time);

	*dos_date = t->tm_mday + (t->tm_mon + 1) * 32 +
	            (t->tm_year + 1900 - 1980) * 512;
	*dos_time = t->tm_sec / 2 + t->tm_min * 32 + t->tm_hour * 2048;
}

static int write_zip_archive(const struct archiver *ar,
			     struct archiver_args *args)
{
	int err;

	dos_time(&args->time, &zip_date, &zip_time);

	zip_dir = xmalloc(ZIP_DIRECTORY_MIN_SIZE);
	zip_dir_size = ZIP_DIRECTORY_MIN_SIZE;

	err = write_archive_entries(args, write_zip_entry);
	if (!err)
		write_zip_trailer(args->commit_sha1);

	free(zip_dir);

	return err;
}

static struct archiver zip_archiver = {
	"zip",
	write_zip_archive,
	ARCHIVER_WANT_COMPRESSION_LEVELS|ARCHIVER_REMOTE
};

void init_zip_archiver(void)
{
	register_archiver(&zip_archiver);
}
Commit	Line	Data
e4fbbfe9 RS	1	/*
	2	* Copyright (c) 2006 Rene Scharfe
	3	*/
e4fbbfe9	4	#include "cache.h"
ec06bff5	5	#include "archive.h"
2158f883	6	#include "streaming.h"
88182bab	7	#include "utf8.h"
e4fbbfe9	8
e4fbbfe9 RS	9	static int zip_date;
	10	static int zip_time;
	11
	12	static unsigned char *zip_dir;
	13	static unsigned int zip_dir_size;
	14
	15	static unsigned int zip_offset;
	16	static unsigned int zip_dir_offset;
	17	static unsigned int zip_dir_entries;
	18
	19	#define ZIP_DIRECTORY_MIN_SIZE (1024 * 1024)
88182bab RS	20	#define ZIP_STREAM (1 << 3)
88182bab RS	21	#define ZIP_UTF8 (1 << 11)
e4fbbfe9 RS	22
	23	struct zip_local_header {
	24	unsigned char magic[4];
	25	unsigned char version[2];
	26	unsigned char flags[2];
	27	unsigned char compression_method[2];
	28	unsigned char mtime[2];
	29	unsigned char mdate[2];
	30	unsigned char crc32[4];
	31	unsigned char compressed_size[4];
	32	unsigned char size[4];
	33	unsigned char filename_length[2];
	34	unsigned char extra_length[2];
0ea865ce	35	unsigned char _end[1];
e4fbbfe9 RS	36	};
e4fbbfe9 RS	37
2158f883 RS	38	struct zip_data_desc {
	39	unsigned char magic[4];
	40	unsigned char crc32[4];
	41	unsigned char compressed_size[4];
	42	unsigned char size[4];
	43	unsigned char _end[1];
	44	};
	45
e4fbbfe9 RS	46	struct zip_dir_header {
	47	unsigned char magic[4];
	48	unsigned char creator_version[2];
	49	unsigned char version[2];
	50	unsigned char flags[2];
	51	unsigned char compression_method[2];
	52	unsigned char mtime[2];
	53	unsigned char mdate[2];
	54	unsigned char crc32[4];
	55	unsigned char compressed_size[4];
	56	unsigned char size[4];
	57	unsigned char filename_length[2];
	58	unsigned char extra_length[2];
	59	unsigned char comment_length[2];
	60	unsigned char disk[2];
	61	unsigned char attr1[2];
	62	unsigned char attr2[4];
	63	unsigned char offset[4];
0ea865ce	64	unsigned char _end[1];
e4fbbfe9 RS	65	};
	66
	67	struct zip_dir_trailer {
	68	unsigned char magic[4];
	69	unsigned char disk[2];
	70	unsigned char directory_start_disk[2];
	71	unsigned char entries_on_this_disk[2];
	72	unsigned char entries[2];
	73	unsigned char size[4];
	74	unsigned char offset[4];
	75	unsigned char comment_length[2];
0ea865ce	76	unsigned char _end[1];
e4fbbfe9 RS	77	};
e4fbbfe9 RS	78
0ea865ce RS	79	/*
	80	* On ARM, padding is added at the end of the struct, so a simple
	81	* sizeof(struct ...) reports two bytes more than the payload size
	82	* we're interested in.
	83	*/
	84	#define ZIP_LOCAL_HEADER_SIZE offsetof(struct zip_local_header, _end)
2158f883	85	#define ZIP_DATA_DESC_SIZE offsetof(struct zip_data_desc, _end)
0ea865ce RS	86	#define ZIP_DIR_HEADER_SIZE offsetof(struct zip_dir_header, _end)
	87	#define ZIP_DIR_TRAILER_SIZE offsetof(struct zip_dir_trailer, _end)
	88
e4fbbfe9 RS	89	static void copy_le16(unsigned char *dest, unsigned int n)
	90	{
	91	dest[0] = 0xff & n;
	92	dest[1] = 0xff & (n >> 010);
	93	}
	94
	95	static void copy_le32(unsigned char *dest, unsigned int n)
	96	{
	97	dest[0] = 0xff & n;
	98	dest[1] = 0xff & (n >> 010);
	99	dest[2] = 0xff & (n >> 020);
	100	dest[3] = 0xff & (n >> 030);
	101	}
	102
	103	static void zlib_deflate(void data, unsigned long size,
3a176c6c	104	int compression_level, unsigned long *compressed_size)
e4fbbfe9	105	{
ef49a7a0	106	git_zstream stream;
e4fbbfe9 RS	107	unsigned long maxsize;
	108	void *buffer;
	109	int result;
	110
	111	memset(&stream, 0, sizeof(stream));
55bb5c91	112	git_deflate_init(&stream, compression_level);
225a6f10	113	maxsize = git_deflate_bound(&stream, size);
e4fbbfe9 RS	114	buffer = xmalloc(maxsize);
	115
	116	stream.next_in = data;
	117	stream.avail_in = size;
	118	stream.next_out = buffer;
	119	stream.avail_out = maxsize;
	120
	121	do {
55bb5c91	122	result = git_deflate(&stream, Z_FINISH);
e4fbbfe9 RS	123	} while (result == Z_OK);
	124
	125	if (result != Z_STREAM_END) {
	126	free(buffer);
	127	return NULL;
	128	}
	129
55bb5c91	130	git_deflate_end(&stream);
e4fbbfe9 RS	131	*compressed_size = stream.total_out;
	132
	133	return buffer;
	134	}
	135
2158f883 RS	136	static void write_zip_data_desc(unsigned long size,
	137	unsigned long compressed_size,
	138	unsigned long crc)
	139	{
	140	struct zip_data_desc trailer;
	141
	142	copy_le32(trailer.magic, 0x08074b50);
	143	copy_le32(trailer.crc32, crc);
	144	copy_le32(trailer.compressed_size, compressed_size);
	145	copy_le32(trailer.size, size);
	146	write_or_die(1, &trailer, ZIP_DATA_DESC_SIZE);
	147	}
	148
ebf5374a RS	149	static void set_zip_dir_data_desc(struct zip_dir_header *header,
	150	unsigned long size,
	151	unsigned long compressed_size,
	152	unsigned long crc)
	153	{
	154	copy_le32(header->crc32, crc);
	155	copy_le32(header->compressed_size, compressed_size);
	156	copy_le32(header->size, size);
	157	}
	158
	159	static void set_zip_header_data_desc(struct zip_local_header *header,
	160	unsigned long size,
	161	unsigned long compressed_size,
	162	unsigned long crc)
	163	{
	164	copy_le32(header->crc32, crc);
	165	copy_le32(header->compressed_size, compressed_size);
	166	copy_le32(header->size, size);
	167	}
	168
88182bab RS	169	static int has_only_ascii(const char *s)
	170	{
	171	for (;;) {
	172	int c = *s++;
	173	if (c == '\0')
	174	return 1;
	175	if (!isascii(c))
	176	return 0;
	177	}
	178	}
	179
2158f883 RS	180	#define STREAM_BUFFER_SIZE (1024 * 16)
2158f883 RS	181
562e25ab	182	static int write_zip_entry(struct archiver_args *args,
9cb513b7 NTND	183	const unsigned char *sha1,
	184	const char *path, size_t pathlen,
	185	unsigned int mode)
e4fbbfe9 RS	186	{
	187	struct zip_local_header header;
	188	struct zip_dir_header dirent;
bb52d22e	189	unsigned long attr2;
e4fbbfe9	190	unsigned long compressed_size;
e4fbbfe9 RS	191	unsigned long crc;
e4fbbfe9 RS	192	unsigned long direntsize;
e4fbbfe9	193	int method;
e4fbbfe9	194	unsigned char *out;
e4fbbfe9	195	void *deflated = NULL;
9cb513b7	196	void *buffer;
2158f883 RS	197	struct git_istream *stream = NULL;
2158f883 RS	198	unsigned long flags = 0;
9cb513b7	199	unsigned long size;
e4fbbfe9	200
38f4d138	201	crc = crc32(0, NULL, 0);
e4fbbfe9	202
88182bab RS	203	if (!has_only_ascii(path)) {
	204	if (is_utf8(path))
	205	flags \|= ZIP_UTF8;
	206	else
	207	warning("Path is not valid UTF-8: %s", path);
	208	}
	209
e4fbbfe9	210	if (pathlen > 0xffff) {
562e25ab RS	211	return error("path too long (%d chars, SHA1: %s): %s",
562e25ab RS	212	(int)pathlen, sha1_to_hex(sha1), path);
e4fbbfe9 RS	213	}
e4fbbfe9 RS	214
302b9282	215	if (S_ISDIR(mode) \|\| S_ISGITLINK(mode)) {
e4fbbfe9	216	method = 0;
62cdce17	217	attr2 = 16;
e4fbbfe9	218	out = NULL;
60df6bd1	219	size = 0;
e4fbbfe9	220	compressed_size = 0;
9cb513b7 NTND	221	buffer = NULL;
9cb513b7 NTND	222	size = 0;
62cdce17	223	} else if (S_ISREG(mode) \|\| S_ISLNK(mode)) {
2158f883	224	enum object_type type = sha1_object_info(sha1, &size);
9cb513b7	225
62cdce17	226	method = 0;
bb52d22e JH	227	attr2 = S_ISLNK(mode) ? ((mode \| 0777) << 16) :
bb52d22e JH	228	(mode & 0111) ? ((mode) << 16) : 0;
2158f883	229	if (S_ISREG(mode) && args->compression_level != 0 && size > 0)
62cdce17	230	method = 8;
e4fbbfe9	231	compressed_size = size;
2158f883 RS	232
2158f883 RS	233	if (S_ISREG(mode) && type == OBJ_BLOB && !args->convert &&
c743c215	234	size > big_file_threshold) {
2158f883 RS	235	stream = open_istream(sha1, &type, &size, NULL);
	236	if (!stream)
	237	return error("cannot stream blob %s",
	238	sha1_to_hex(sha1));
	239	flags \|= ZIP_STREAM;
	240	out = buffer = NULL;
	241	} else {
	242	buffer = sha1_file_to_archive(args, path, sha1, mode,
	243	&type, &size);
	244	if (!buffer)
	245	return error("cannot read %s",
	246	sha1_to_hex(sha1));
	247	crc = crc32(crc, buffer, size);
	248	out = buffer;
	249	}
e4fbbfe9	250	} else {
562e25ab RS	251	return error("unsupported file mode: 0%o (SHA1: %s)", mode,
562e25ab RS	252	sha1_to_hex(sha1));
e4fbbfe9 RS	253	}
e4fbbfe9 RS	254
2158f883	255	if (buffer && method == 8) {
3a176c6c RS	256	deflated = zlib_deflate(buffer, size, args->compression_level,
3a176c6c RS	257	&compressed_size);
e4fbbfe9 RS	258	if (deflated && compressed_size - 6 < size) {
	259	/* ZLIB --> raw compressed data (see RFC 1950) */
	260	/* CMF and FLG ... */
	261	out = (unsigned char *)deflated + 2;
	262	compressed_size -= 6; /* ... and ADLER32 */
	263	} else {
	264	method = 0;
	265	compressed_size = size;
	266	}
	267	}
	268
	269	/* make sure we have enough free space in the dictionary */
0ea865ce	270	direntsize = ZIP_DIR_HEADER_SIZE + pathlen;
e4fbbfe9 RS	271	while (zip_dir_size < zip_dir_offset + direntsize) {
	272	zip_dir_size += ZIP_DIRECTORY_MIN_SIZE;
	273	zip_dir = xrealloc(zip_dir, zip_dir_size);
	274	}
	275
	276	copy_le32(dirent.magic, 0x02014b50);
bb52d22e JH	277	copy_le16(dirent.creator_version,
bb52d22e JH	278	S_ISLNK(mode) \|\| (S_ISREG(mode) && (mode & 0111)) ? 0x0317 : 0);
cf72fb07	279	copy_le16(dirent.version, 10);
2158f883	280	copy_le16(dirent.flags, flags);
e4fbbfe9 RS	281	copy_le16(dirent.compression_method, method);
	282	copy_le16(dirent.mtime, zip_time);
	283	copy_le16(dirent.mdate, zip_date);
ebf5374a	284	set_zip_dir_data_desc(&dirent, size, compressed_size, crc);
e4fbbfe9 RS	285	copy_le16(dirent.filename_length, pathlen);
	286	copy_le16(dirent.extra_length, 0);
	287	copy_le16(dirent.comment_length, 0);
	288	copy_le16(dirent.disk, 0);
	289	copy_le16(dirent.attr1, 0);
62cdce17	290	copy_le32(dirent.attr2, attr2);
e4fbbfe9	291	copy_le32(dirent.offset, zip_offset);
e4fbbfe9 RS	292
e4fbbfe9 RS	293	copy_le32(header.magic, 0x04034b50);
cf72fb07	294	copy_le16(header.version, 10);
2158f883	295	copy_le16(header.flags, flags);
e4fbbfe9 RS	296	copy_le16(header.compression_method, method);
	297	copy_le16(header.mtime, zip_time);
	298	copy_le16(header.mdate, zip_date);
2158f883 RS	299	if (flags & ZIP_STREAM)
	300	set_zip_header_data_desc(&header, 0, 0, 0);
	301	else
	302	set_zip_header_data_desc(&header, size, compressed_size, crc);
e4fbbfe9 RS	303	copy_le16(header.filename_length, pathlen);
e4fbbfe9 RS	304	copy_le16(header.extra_length, 0);
0ea865ce RS	305	write_or_die(1, &header, ZIP_LOCAL_HEADER_SIZE);
0ea865ce RS	306	zip_offset += ZIP_LOCAL_HEADER_SIZE;
e4fbbfe9 RS	307	write_or_die(1, path, pathlen);
e4fbbfe9 RS	308	zip_offset += pathlen;
2158f883 RS	309	if (stream && method == 0) {
	310	unsigned char buf[STREAM_BUFFER_SIZE];
	311	ssize_t readlen;
	312
	313	for (;;) {
	314	readlen = read_istream(stream, buf, sizeof(buf));
	315	if (readlen <= 0)
	316	break;
	317	crc = crc32(crc, buf, readlen);
	318	write_or_die(1, buf, readlen);
	319	}
	320	close_istream(stream);
	321	if (readlen)
	322	return readlen;
	323
	324	compressed_size = size;
	325	zip_offset += compressed_size;
	326
	327	write_zip_data_desc(size, compressed_size, crc);
	328	zip_offset += ZIP_DATA_DESC_SIZE;
	329
c743c215 RS	330	set_zip_dir_data_desc(&dirent, size, compressed_size, crc);
	331	} else if (stream && method == 8) {
	332	unsigned char buf[STREAM_BUFFER_SIZE];
	333	ssize_t readlen;
	334	git_zstream zstream;
	335	int result;
	336	size_t out_len;
	337	unsigned char compressed[STREAM_BUFFER_SIZE * 2];
	338
	339	memset(&zstream, 0, sizeof(zstream));
	340	git_deflate_init(&zstream, args->compression_level);
	341
	342	compressed_size = 0;
	343	zstream.next_out = compressed;
	344	zstream.avail_out = sizeof(compressed);
	345
	346	for (;;) {
	347	readlen = read_istream(stream, buf, sizeof(buf));
	348	if (readlen <= 0)
	349	break;
	350	crc = crc32(crc, buf, readlen);
	351
	352	zstream.next_in = buf;
	353	zstream.avail_in = readlen;
	354	result = git_deflate(&zstream, 0);
	355	if (result != Z_OK)
	356	die("deflate error (%d)", result);
	357	out = compressed;
	358	if (!compressed_size)
	359	out += 2;
	360	out_len = zstream.next_out - out;
	361
	362	if (out_len > 0) {
	363	write_or_die(1, out, out_len);
	364	compressed_size += out_len;
	365	zstream.next_out = compressed;
	366	zstream.avail_out = sizeof(compressed);
	367	}
	368
	369	}
	370	close_istream(stream);
	371	if (readlen)
	372	return readlen;
	373
	374	zstream.next_in = buf;
	375	zstream.avail_in = 0;
	376	result = git_deflate(&zstream, Z_FINISH);
	377	if (result != Z_STREAM_END)
	378	die("deflate error (%d)", result);
	379
	380	git_deflate_end(&zstream);
	381	out = compressed;
	382	if (!compressed_size)
	383	out += 2;
	384	out_len = zstream.next_out - out - 4;
	385	write_or_die(1, out, out_len);
	386	compressed_size += out_len;
	387	zip_offset += compressed_size;
	388
	389	write_zip_data_desc(size, compressed_size, crc);
	390	zip_offset += ZIP_DATA_DESC_SIZE;
	391
2158f883 RS	392	set_zip_dir_data_desc(&dirent, size, compressed_size, crc);
2158f883 RS	393	} else if (compressed_size > 0) {
e4fbbfe9 RS	394	write_or_die(1, out, compressed_size);
	395	zip_offset += compressed_size;
	396	}
	397
e4fbbfe9	398	free(deflated);
9cb513b7	399	free(buffer);
e4fbbfe9	400
ebf5374a RS	401	memcpy(zip_dir + zip_dir_offset, &dirent, ZIP_DIR_HEADER_SIZE);
	402	zip_dir_offset += ZIP_DIR_HEADER_SIZE;
	403	memcpy(zip_dir + zip_dir_offset, path, pathlen);
	404	zip_dir_offset += pathlen;
	405	zip_dir_entries++;
	406
562e25ab	407	return 0;
e4fbbfe9 RS	408	}
	409
	410	static void write_zip_trailer(const unsigned char *sha1)
	411	{
	412	struct zip_dir_trailer trailer;
	413
	414	copy_le32(trailer.magic, 0x06054b50);
	415	copy_le16(trailer.disk, 0);
	416	copy_le16(trailer.directory_start_disk, 0);
	417	copy_le16(trailer.entries_on_this_disk, zip_dir_entries);
	418	copy_le16(trailer.entries, zip_dir_entries);
	419	copy_le32(trailer.size, zip_dir_offset);
	420	copy_le32(trailer.offset, zip_offset);
	421	copy_le16(trailer.comment_length, sha1 ? 40 : 0);
	422
	423	write_or_die(1, zip_dir, zip_dir_offset);
0ea865ce	424	write_or_die(1, &trailer, ZIP_DIR_TRAILER_SIZE);
e4fbbfe9 RS	425	if (sha1)
	426	write_or_die(1, sha1_to_hex(sha1), 40);
	427	}
	428
	429	static void dos_time(time_t time, int dos_date, int *dos_time)
	430	{
	431	struct tm *t = localtime(time);
	432
	433	dos_date = t->tm_mday + (t->tm_mon + 1) 32 +
	434	(t->tm_year + 1900 - 1980) * 512;
	435	dos_time = t->tm_sec / 2 + t->tm_min 32 + t->tm_hour * 2048;
	436	}
	437
4d7c9898 JK	438	static int write_zip_archive(const struct archiver *ar,
4d7c9898 JK	439	struct archiver_args *args)
ec06bff5	440	{
562e25ab RS	441	int err;
562e25ab RS	442
ec06bff5 FBH	443	dos_time(&args->time, &zip_date, &zip_time);
	444
	445	zip_dir = xmalloc(ZIP_DIRECTORY_MIN_SIZE);
	446	zip_dir_size = ZIP_DIRECTORY_MIN_SIZE;
562e25ab RS	447
	448	err = write_archive_entries(args, write_zip_entry);
	449	if (!err)
	450	write_zip_trailer(args->commit_sha1);
ec06bff5 FBH	451
	452	free(zip_dir);
	453
562e25ab	454	return err;
ec06bff5	455	}
13e0f88d JK	456
	457	static struct archiver zip_archiver = {
	458	"zip",
	459	write_zip_archive,
7b97730b	460	ARCHIVER_WANT_COMPRESSION_LEVELS\|ARCHIVER_REMOTE
13e0f88d JK	461	};
	462
	463	void init_zip_archiver(void)
	464	{
	465	register_archiver(&zip_archiver);
	466	}